Drawing glass articles.



FATENTED MAR. 19, 1907.

2 sums-sum 1.

J. H. LUBBERS.- DRAWING GLASS vARTICLES. APPLICATION FILED un. 12, 1905. BEH/BWED JUNE 25, 1906.

UNI ED s'rarns Parana QFFIQE.

JOHN H. 'LUBBERS, OF ALLEGHENY, PENNSYLVANIA, ASSIGNOR TO WINDOW GLASS MACHINE COMPANY. OF PITTSBURG, PENNSYL- VANIA, A CORPORATION OF NEW JERSEY.

DRAWING GLASS ARTICLES.

Specification of Letters ?atent.

Patented Maren 19,1907.

Application filed April 12, 1905- Renewed June 25, 1906. Serial No 323,349.

To all wit/mt it may concern.-

Be it known that I, JOHN H. Lennnns, of Allegheny city, Allegheny county, Pennsylvania, have invented a new and useful Im- 5 provernent in Drawing Glass Articles, of

which the following is a full, clear, and exact description, reference being had to the accompanying drawings, forming part of this specification, in which- Figure 1 is a sectional side elevation showin one form of apparatus for drawing glass cy inders in accordance with my invention, and Figs. 2 and 3 are similar views showing other forms of apparatus.

, My invention relates to the drawing of glass articles from a bath of molten glass. Herctofore in carrying out such operations the receptacle containing molten glass has remained stationary during the drawing op- I 2'0 l eration ,the glass being drawn from the bath by moving the bait relatively to the receptacle. My invention consists inmoving the reiceptacle away from the bait during the drawing operation. The bait may or may not be moved during the movement of the receptacle, and I may move the baitsupport either during the drawing operation or after. My invention also consists in certain other novel steps and features, all substantially as hereinafter described and claimed.

i ,"In the drawings, referring to the form of Fig. l, 2 represents a glass-pot carried on a refractory block 3. This block is supported 'upon the upper end of the plunger or pistonred 4 of a cylinder5, which may be a hydraulic, pnenimitic, or other desirable form of -moi ive cylinder.

which may be carried in the block 3 and may be supplied with a mixture of air and gas 0 through the flexible pipes 7. In order to retain the heat and protect the article during drawing, I may employ a vertically-extending shaft or inclosure S, which may be of refractory material and of a shape correspond- 5 ing to the outline of the pot.

.9 represents a water-cooled ring resting upon the pot and having inlet and outlet pipes 10 and 1] for cooling fluid 12 represents the bait, having a sten1'l3 re- I movably clamped to a drawing-frame 14:, the hollow stem 13 receivinggnr through a pipe 15. The movable frame 14 is guided upon uprights ltiand may be raised or lowered by (3 (i represents gas-burners,

flexible connections, (indicated at 17.) In carrying out the operation the pot is supplied with molten glass when in its upper position, the chilling-ring may be put in position, if such is used, the bait is brought in engagement with the glass either by raising the pot or lowering the bait, and the pot is then gradually lowered to draw the glass. The supply of air may be eontrolledin any desirable manner, and the frame carrying the bait may be moved upwardly at the same time that the pot is lowered, if desired. If the bait remains stationary during the drawing, the article (in this case a cylinder) will be drawn within the casing or inclosurc. The article when drawn may be lifted out or removed in any desirable manner.

In Fig. 2 I show a form similar to that of Fig. 1, except that theinclosure for the potis not employed and tlte pot 2 is of double form, having an upper and lower cavity for receiving the glass. The pot may thus be reversed in succeeding drawing operations. In this figure par'ts similar to those of Fig. l are designated, by similar numerals with the letter a applied.

In Fig. 3 I Show a form of the invention ar ranged for drawing sheets or plates of glass. In this form 9" 9 represent watercooled pipes extending over tilting shieldsl S, which may be moved by hand-lcvers H). 20 indicates a 'drawi-i-ig chamber having hollow heated walls, within which dran ing-chamher the sheet ni' y be drawn if the said chamber is lowerhilo vitli tllepot. In this figure parts similar to Fig. l are indicated by similar numerals with the letter b applied.

' The advantages of my invention result from the lowering or moving of the glass receptacle away from thebait during the dI'ELVV-w ing operation. If the bait is not moved, its

connections may be stationary; thus doingawa' with the movable supply connections.

There has been (wilsidfl'flblc praciic: l difiiculty inproperly rcgula ting the speed of the motor which moves the bait in the operation of glass drawing as heretofore practiced for the reason that as the length of the article being drawn increases the weight upon the bait and the consquent load upon the motor also rapidly im'reases. By holding the bait stationary this dilliculty is entirely overcomciinasmuchlhs tlic: l1a|igc' in" thc"\\'cight of the bath is relatively very slight during during the drawing; substantially as dethe drawing operation, owing to the considcrable weight of the glass-receptacle, and the load on the motor is therelore practically constant, so that its speed can be readily and accurately controlled. Even if both the bait and bath be moved during the drawing operation, this advantage is retained either wholly or in part, since the speed regulation may be applied to the nnwement of the bath alone, or it applied to both the bath and. bait the bait has a much shorter distance to travel in drawing an article of given length.

The bait may be moved during or alt er the drawing operation; the chilling deviccmay or may not be used, as desired; other forms of motors or connections may be used for lowering the receptacle, and many other changes may be made in. the dill'erent parts of the apparatus without departing from my invention, since I consider myseli the first to move the body of glass away from the bait during the drawing operation.

I elain1- 1. The method. of drawing glass articles, consisting in engaging the bait with glass in a receptacle and then moving the receptacle.

away from the bait; substantially as described.

2. The method of drawing glass artic es, consisting in engaging a bait with a body oi" molten glass and then lowering the body oi molten glass away from the bait; substantially as described.

3. The method of drawing glass articles, consisting in engaging the bait with a body ol molten glass and then simultaneously moving the bait and the body of glass during the drawing operation; substantially as de-' scribed.

4. The method of drawii'ig glass articles, consisting in engaging a mass of molten glass, moving the mass oi glass to draw the article,

' and inclosing said article at least partially during the drawing operation; substantially as described.

The method of drawing glass, consisting in engaging a bait with a mass of molten glass, moving the glass away from the bait during the drawing operation and h ating the mass ol glass during the drawing; substantially as described.

(3. The method oi drawing hollow glass articles, consisting in moving a mass of glass away troin a baitengaged therewith and supplying air to the interior ol the article scribed.

7. In glass-drawing apparatus, a glass-receptacle and mechanism for moving said recept'acle away lrom the baitduring the drawing operation; substantially as described.

8. In glass-drawing apparatus, a bait, a glassa'eceptacle beneath the same and means for lowering the receptacle during the drawing operation; substantially as described.

5). In glass-drawing apparatus, a bait, a glass-receptacle, means l'or moving the bait away l'rom the re 'cptacle, and means for moving the receptacle toward and away lrom the bait during the drawing operation: substantially as described.

10. The method ol drawing hollow glass articles, which consists in moving a mass of glass away from a bait engaged therewith, supplying air to the interior of the article during the drawin amlcontrolling the airsupply: substantially as described.

ll. The method of drawing glass articles, consisting in engaging the bait. with glass in a receptacle, moving the receptacle awav lrom the bait, and regu ating the rate of suc l movement: substantially as described.

' 12. The method of drawing glass articles,

consisting in engaging the bait with a body of molten glass, and indcpemlcntly moving the bait. and the body ol' glass; substantially as described.

13. In glass-drawing apparatus, a bait, a glass-receptacle, means for moving the bait away from the receptacle, and means for independently moving the receptacle toward and away from the bait during the drawing operation; substantially as described.

14. In glass-drawing apparatus, a glass-receptacle, mechanism for moving the said receptacle away from the bait during the drawing operation, and means lor supplying heat to the receptacle; substantially as described.

15. In glass-drawing apparatus, a glass-receptacle, mechanism for moving said receptacle away l'rom the bait during the drawing operation, and means movable with the receptacle for supplying heatthereto; substantially as described ln testimony whereof I have hereunto set my hand.

, JOHN H. memes. \Vitnesses:

J. A. BOLARD,

(. l). Guano. 

